http://forum.redump.org/post/54268/#p54268 -- sarami claims it should save the .sub for the HD zone as well, if the "gd" command is used. Could you try again with the latest test version of DIC?
I can't use DIC with my Plextor 708
All the time I get the error "Failed to get write offset" when I try to dump the HD area.
D:\Sistemas\Dreamcast\DIC>DiscImageCreator.exe gd g QUIZ.bin 8 /c2
OS
Windows 7 Professional Service Pack 1 64bit
AppVersion
x86, AnsiBuild, Mar 14 2017 11:02:35
/c2 val1 is omitted. set [1024]
/c2 val2 is omitted. set [4096]
/c2 val3 is omitted. set [4]
CurrentDirectory
D:\Sistemas\Dreamcast\DIC
WorkingPath
Argument: QUIZ.bin
FullPath: D:\Sistemas\Dreamcast\DIC\QUIZ
Drive: D:
Directory: \Sistemas\Dreamcast\DIC\
Filename: QUIZ
Extension: .bin
Start time: 2017-03-15(Wed) 19:16:25
Set the drive speed: 1411KB/sec
Allocating packed memory for C2 errors: 8192
This drive supports [command: 0xd8, subch: 00]
Failed to get write-offset
This drive supports [command: 0xd8, subch: 0x1]
This drive supports [command: 0xd8, subch: 0x2]
Failed to get write-offset
This drive supports [command: 0xd8, subch: 0x3]
This drive supports [command: 0xd8, subch: 0x8]
Failed to get write-offset
End time: 2017-03-15(Wed) 19:16:58
I always use the dcdumper method with the Samsung SH-D162C for HD area.